Rotary distributor fuel injection apparatus

Abstract

A rotary distributor fuel injection apparatus comprises a distributor rotor (3) having a fuel inlet port (c) and delivery port (d) which communicates in turn with successive ports (g) supplying individual cylinders. The rotor (3) has a central axial passage (b) connected to the ports (c) and (d) and a radially drilled port (e) which aligns succesively with ports (h), radially drilled in the sleeve (13), whose rotation is controlled by a helical groove (i) on a thrust sleeve (14) through a peg (17) located on the sleeve (14). Centrifugal governor weights (15) and (16) control the position of the sleeve (14) and thereby the instant at which the port (e) communicates with a port (h) to terminate injection.

We claim: 
     
       1. A rotary distributor fuel-injection apparatus, comprising: a distributor body;   a hydraulic head mounted in said distributor body having at least one fuel inlet bore and at least one fuel outlet bore;   a distributor member axially fixed in and rotatable relative to said head, said distributor member having an axial bore,   radial bores connected to said axial bore and alignable with said fuel inlet bore and said fuel outlet bores,   a further radial bore communicating with said axial bore,   an oblique groove along a periphery of said distributor member communicating with said further radial bore,   a transverse bore communicating with said axial bore, and   a pair of opposite pumping plungers displaceable in said transverse bore;     a cam in said body surrounding said distributor member and controlling said pumping plungers upon rotation of said distributor member;   a shaft rotatable in said body and connected with said distributor member for rotating same;   governor weights on said shaft;   a thrust sleeve on said shaft directly engaged by and axially displaceable by said governor weights, said thrust sleeve being formed directly with a helical groove; and   a valve sleeve rotatable on said distributor member, formed with a radial port alignable with said oblique groove, and provided with a peg received in said helical groove for direct rotation of said valve sleeve by said thrust sleeve for discharge of fluid from said axial bore into said body to terminate an injection cycle.